CTAP检查时,导管应置于()
A.腹腔动脉内
B.肝动脉内
C.肠系膜上动脉或脾动脉内
D.门静脉内
E.肠系膜上静脉内
参考答案:C
管理信息系统的结构按管理层次可分为
A.战略层、战术层、业务层、事务层
B.高层、中层、基层
C.决策层、职能层、事务层、操作层
D.管理层、技术层、操作层
—The cars give off a great deal of waste gas in the street.
—Yes, But I’m sure something will be done to air pollution.
A.reduce
B.remove
C.collect
D.warn